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The plates of a parallel plate capacitor...

The plates of a parallel plate capacitor have an area of 90 `cm^2` each and are separated by 2.5 mm. The capacitor is charged by connecting it to a 400 V supply.
View this energy as stored in the electrostatic field between the plates and obtain the energy per unit volume (u).

Text Solution

Verified by Experts

Capacitance, `C= (in_0 alpha)/(d) = (8.854xx10^(-12) 90xx10^(-4))/(2.5xx10^(-3))= 3.187 xx10^(-11)F`
Energy per unit volume,
`u = (2.55xx10^(-6))/(90xx10^(-4)xx2.5xx10^(-3))= 0.113 J* m^(-3)`
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